On my way to get dessert, I made a couple of videos for the Lexus Pre Collision system...NisSan was asking about it in another thread.
Funny...my camera sure picks up the "s" when I speak..sounds like I have a lisp!
This one's on the highway...cruise set at 90
https://youtu.be/WhShTOyTEhMAgain 90, slowing to 60, then to a stop
https://youtu.be/YQtgtog11FoSet at 90, but on city street...50 speed limit...stop..on ramp..speed up..stop.
https://youtu.be/pQk_V97HVHILast one...city traffic.
https://youtu.be/y_j7B-i4-Q0All of these were on the closest following setting. Still tons of time to stop even if you were not watching. Since this is first generation, slows the car to about 20km/h, then you have to react and bring car to complete stop. While the system is reacting, it firms the suspension (preventing brake dive), pre tensions seat belt, pushes the brakes pads to rotors taking out any slack and boosts pressure in the power brake pump.